Search found 337 matches

by Dui, ni shuo de dui
Oct 10 2019 2:16am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 376
Views: 45714

Re: Suzuki GSX-R e899 K2

Silly question maybe, but can a normal chain take that kind of torque?
by Dui, ni shuo de dui
Sep 17 2019 12:47am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 711
Views: 32644

Re: APL's DIY axial-flux motor

Haha, I'm not worried, I saw how quickly you were able to put together an absolutely awesome motor, so I completely trust your ability to do it again! My only concern was for you not to get too distracted so you could be back on track with a new motor version asap! Note that, even if you use a corel...
by Dui, ni shuo de dui
Sep 16 2019 9:28pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 711
Views: 32644

Re: APL's DIY axial-flux motor

Is there any advantage for you to go for a coreless motor? Aside from being lighter, which I guess doesn't matter so much on your build since your motor is inboard, what would be the advantage? I'm not really familiar with these motors, so correct me if I'm wrong, but I assume these have much less t...
by Dui, ni shuo de dui
Sep 16 2019 12:53am
Forum: Battery Technology
Topic: DIY High Cell Count Balance Charger for Cheap
Replies: 17
Views: 571

Re: DIY High Cell Count Balance Charger for Cheap

600A :shock: that must be on your 250 clone? I should buy one of those, they look pretty good! It's not on my motorbike, mine is limited by the controller to "only" 210 Amps battery. It's on a friend's bike I've helped building. But yes, I also have this very same BMS on my motorbike and it works r...
by Dui, ni shuo de dui
Sep 11 2019 9:11pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 711
Views: 32644

Re: APL's DIY axial-flux motor

If you want a non permanent solution to mount your coils, maybe something like this could work? motor idea Part Studio 1 - Google Chrome.jpg Just two metal rods going through the cores, and 2 screws at the end so they stay in place (I didn't drew the screws but I guess you get the idea). It might sl...
by Dui, ni shuo de dui
Sep 10 2019 8:50pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Max range 40 km, after 5 charges only 15 ???
Replies: 12
Views: 564

Re: Max range 40 km, after 5 charges only 15 ???

just give the cable lots of slack Rotated a few turns the withe nut and...voila! We were right, now running freely with the wheel up the ground, it gives me 26 km/h. The marker never passed above 22 before! Still don't know how to adjust/tune it right. This is not like in a bike, and also it's all ...
by Dui, ni shuo de dui
Sep 10 2019 8:41pm
Forum: Battery Technology
Topic: DIY High Cell Count Balance Charger for Cheap
Replies: 17
Views: 571

Re: DIY High Cell Count Balance Charger for Cheap

Ampacity choices are 50A/80A/100A/120A How can it withstand 600A? No idea where you got these choices values, but I have the 300A version. See here: https://www.aliexpress.com/item/32826820690.html It is marketed at 300A but you can put much higher values in the firmware. We got it working at 600A ...
by Dui, ni shuo de dui
Sep 10 2019 12:38am
Forum: Battery Technology
Topic: DIY High Cell Count Balance Charger for Cheap
Replies: 17
Views: 571

Re: DIY High Cell Count Balance Charger for Cheap

Heres the predicament: -Cheap BMSs are scary, quality boards cost $$$$ -I couldn't find a simple monitor/equalizer that would bleed off high cells as well as notify me when any cell reached 3.2v (they all trip at ~2.5v for what ive found). This would be used with a low current 84v pack charger. -Ba...
by Dui, ni shuo de dui
Sep 09 2019 10:48pm
Forum: Battery Technology
Topic: BMS broken, damaged cells, or both?
Replies: 59
Views: 999

Re: BMS broken, damaged cells, or both?

I will wait till tomorrow, till my 150A bluetooth BMS will arrive.. Today I got a notification it is already here in Holland.. Does anybody now it? Difficult? Yes, I have the 300A version, which is about the same. It'a a really great BMS for the price, easy to install but a bit difficult to set up ...
by Dui, ni shuo de dui
Sep 09 2019 10:34pm
Forum: Battery Technology
Topic: BMS broken, damaged cells, or both?
Replies: 59
Views: 999

Re: BMS broken, damaged cells, or both?

Nice job on your BMS replacement :) Was it a programmable BMS btw or just a "dumb" BMS? If it's programmable then you will need to check that the settings are correct in the firmware. Just a remark you might want to consider, it is very possible that your BMS was "only" a 60A for a very good reason....
by Dui, ni shuo de dui
Sep 09 2019 10:08pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Max range 40 km, after 5 charges only 15 ???
Replies: 12
Views: 564

Re: Max range 40 km, after 5 charges only 15 ???

Can it be an out of tune break? I do not know how to tune it perfectly, but I start to thing the problem might be here.</r> scoot.jpg Of course it can be that, it's one of the most common reasons people see their range decreasing. A deflated tire is also an other very common cause, or even a bad be...
by Dui, ni shuo de dui
Sep 09 2019 9:46pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Battery & BMS Wiring Help
Replies: 10
Views: 349

Re: Battery & BMS Wiring Help

Thanks Amberwolf... I do have the motor connected to the BMS output (P-). Which is easy, because there is no C-... B- on one side and P- on the other. WEll... in going to collect an answer to your second question (what is the spike current when the motor turns on, which was 30 amps) there were spar...
by Dui, ni shuo de dui
Sep 09 2019 2:20am
Forum: Battery Technology
Topic: AliExpress battery pack unboxing (for my eZuma project)
Replies: 224
Views: 11759

Re: AliExpress battery pack unboxing

My bike needs 33mm/385mm front forks, same as Yamaha BWs/Zuma 125. I was thinking of something like these which offer two levels of adjustment: https://www.aliexpress.com/item/32816562992.html?spm=a2g0s.8937460.0.0.75992e0e70l2u1 I had these ones: https://www.aliexpress.com/item/32819425382.html?sp...
by Dui, ni shuo de dui
Sep 05 2019 9:34pm
Forum: Battery Technology
Topic: AliExpress battery pack unboxing (for my eZuma project)
Replies: 224
Views: 11759

Re: AliExpress battery pack unboxing

Front brake upgrade is on my winter project list. The issue is whether I keep the existing mediocre forks and get a 260mm rotor + custom rim-to-rotor adapter, + caliper + matching bracket, or go for a complete set of new forks with matching brakes (which are much more expensive of course). My 2 cen...
by Dui, ni shuo de dui
Sep 04 2019 10:42pm
Forum: Battery Technology
Topic: AliExpress battery pack unboxing (for my eZuma project)
Replies: 224
Views: 11759

Re: AliExpress battery pack unboxing

This is good information but not exactly what I am experiencing -- basically if I move the throttle even minutely, the motor engages. And it doesn't matter where on the (cheap, Chinese, Hall) throttle curve I have the throttle. For example, I cannot do any slow-speed maneuvers. And on a bumpy roads...
by Dui, ni shuo de dui
Sep 03 2019 3:35am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Any engineering geeks? 3d printed frame
Replies: 13
Views: 487

Re: Any engineering geeks? 3d printed frame

The frame on your mpcnc is neat. Probably wouldn't work for routing though. (I need a smaller desktop router, that I can enclose - like my old momus, so I'm less limited in hours it can run - another side project lol). I have a 24in² MPCNC. Nice, a fellow MPCNCer! My setup actually works ok for rou...
by Dui, ni shuo de dui
Aug 30 2019 3:05am
Forum: Electric Aircraft
Topic: Manned multirotor
Replies: 16
Views: 2286

Re: Manned multirotor

Amazing project, congratulations!
That's exactly the kind of stuff I wish I can build someday. Just need some space and save some money... Hopefully that time will come!

Again, bravo and keep up the updates!
by Dui, ni shuo de dui
Aug 30 2019 2:07am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Any engineering geeks? 3d printed frame
Replies: 13
Views: 487

Re: Any engineering geeks? 3d printed frame

Guess that depends on your slicer and jerk settings. I've got the heavy Titan aero with volcano and fullsize not pancake stepper. I've got 2 huge steppers that push the same filament together at the same time through the nozzle. Those are the biggest ones I could find for this format. They can push...
by Dui, ni shuo de dui
Aug 29 2019 9:31pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Any engineering geeks? 3d printed frame
Replies: 13
Views: 487

Re: Any engineering geeks? 3d printed frame

The last thing I put together with long arms like your laptop stand I was able to half the arm diameters by adding holes down the length on the horizontal axis. Took more than half the material out, dropped print time radically and supported more than double weight that was a struggle with the orig...
by Dui, ni shuo de dui
Aug 29 2019 3:45am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Any engineering geeks? 3d printed frame
Replies: 13
Views: 487

Re: Any engineering geeks? 3d printed frame

I was curious if I could build something to support my own weight. Semi sketched out as a center section of a kick scooter add fork mount to one side swingarm to other (simplified pretty sure I'd need to bring the swingarm support back a ways). 500mmx 200mm center section, if I could support my wei...
by Dui, ni shuo de dui
Aug 28 2019 3:39am
Forum: Stand-up E-scooters and E-skateboards
Topic: Stand-up BF.Scooter "Version 2.0a"
Replies: 11
Views: 750

Re: Stand-up scooter "Version 2.0a"

Yay, a new build of alex_2d !! It looks awesome, as always! Just a suggestion: make sure you make some tests with your clamping system on the carbon rods. They usually don't really like to be compressed (they tend to delaminate after some time). That thing will be insane, I can't wait to see the fir...
by Dui, ni shuo de dui
Aug 28 2019 3:27am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Any engineering geeks? 3d printed frame
Replies: 13
Views: 487

Re: Any engineering geeks? 3d printed frame

I'm not sure, what's supposed to be the purpose of this frame? Do you have any picture of the print itself? I'm fairly certain it is possible to build a very solid frame for a scooter/motorcycle out of a plastic 3D printer using filament... But you really need to overbuild it. Lattice structures lik...
by Dui, ni shuo de dui
Aug 07 2019 2:02am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Classis Vespa Smallframe to EV
Replies: 39
Views: 3843

Re: Classis Vespa Smallframe to EV

Wow, that swingarm is absolutely insane. To be honest I don't really like the way it looks once installed on the bike (too beefy for my taste), but it is definitely incredible and very well made. Totally awesome. As for your battery, if I understand correctly 900Wh/72V=12.Ah, this is really on the l...
by Dui, ni shuo de dui
Aug 07 2019 1:21am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: my 48v 1000w customised motorcycle
Replies: 14
Views: 3052

Re: my 48v 1000w customised motorcycle

Really nice bike, I love the front part and the rear wheel. The frame shape is really well suited too. You should really consider ditching the SLA batteries and go for lithium, it would be much lighter, more powerful,a lot more compact and would probably allow you to get an even better look since yo...
by Dui, ni shuo de dui
Aug 06 2019 10:44pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: 2000w electric scooter 60v 12ah battery failure and throttle problem
Replies: 11
Views: 402

Re: 2000w electric scooter 60v 12ah battery failure and throttle problem

That sounds like you have a short circuit somewhere.

Could you post a few pictures so we can have a better understanding of what's going on?